Circuit breaker



FIG. 1 is a front view of a circuit breaker, showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a top, front and right side perspective view thereof.

The broken line portion of the figure drawings is included to show environment only and forms no part of the claimed design. 

CLAIM The ornamental design for a circuit breaker, as shown and described. 